The correct answer is D. green revolution.
The green revolution was a period of agricultural development that began in the mid-20th century. It was characterized by the introduction of new agricultural technologies, such as high-yield varieties of crops and improved irrigation systems. These technologies led to a dramatic increase in agricultural production, which helped to feed the growing population of the world.
The green revolution was not without its critics. Some people argued that it led to the overuse of pesticides and fertilizers, which had a negative impact on the environment. Others argued that it led to the displacement of small farmers, who were unable to compete with large-scale agricultural operations.
Despite these criticisms, the green revolution is generally considered to have been a success. It helped to increase food production and improve the lives of millions of people around the world.
The other options are incorrect.
- Option A, biotechnical revolution, is the application of biological science and technology to industrial processes. It is a relatively new field that has the potential to revolutionize many industries, including agriculture.
- Option B, bioeconomic revolution, is a term used to describe the changes that are taking place in the global economy as a result of the increasing importance of biological resources and technologies. These changes are having a significant impact on agriculture, as well as other industries.
- Option C, greenhouse effect, is the process by which the Earth’s atmosphere traps heat from the sun. This process is essential for life on Earth, but it can also lead to global warming if the levels of greenhouse gases in the atmosphere increase too much.